碳酸根掺杂钼酸铋的制备及其光催化性能的研究

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• 英文论文题名：Synthesis and photocatalytic performance of CO_3~(2-) doped Bi_2MoO_6
• 论文作者：邢永星 ; 杜春芳
• 英文论文作者：Yongxing Xing ; Chunfang Du ; Department of College of Chemistry and Chemical Engineering ; University of Inner Mongolia
• 年：2016
• 作者机构：内蒙古大学化学化工学院;
• 论文关键词：钼酸铋 ; 碳酸根 ; 掺杂 ; 光催化
• 会议召开时间：2016-07-01
• 会议录名称：中国化学会第30届学术年会摘要集-第二十七分会：光化学
• 语种：中文
• 分类号：TQ135.32;O643.36
• 学会代码：ZGHY
• 会议名称：中国化学会第30届学术年会-第二十七分会 ; 光化学
• 会议地点：中国辽宁大连
• 主办单位：中国化学会
• 学会名称：中国化学会
• 页数：1
• 文件大小：217k
• 原文格式：D
• 会议级别：全国

摘要

钼酸铋由于其较窄的禁带宽度(≈2.66e V)被广泛应用于光催化领域。本文以钼酸铵、硝酸铋和柠檬酸钠为原料,采用水热法合成了CO_3~(2-)掺杂的Bi_2MoO_6光催化剂(CO_3~(2-)/Bi_2MoO_6)。通过X-射线衍射、扫描电镜、透射电镜以及紫外-可见吸收光谱等对样品进行了表征,并考察了Bi_2MoO_6及CO_3~(2-)/Bi_2MoO_6在可见光下对罗丹明B的光催化降解活性。结果表明,CO_3~(2-)的掺杂并没有改变Bi_2MoO_6的晶相,但是却导致Bi_2MoO_6吸收边发生红移;光催化活性与CO_3~(2-)的掺杂浓度有关,当柠檬酸钠与硝酸铋摩尔比为7:1时,CO_3~(2-)/Bi_2MoO_6的催化活性最高。
Bi_2MoO_6 has been widely applied in photocatalytic fields due to its narrow band-gap of 2.66 e V. In this paper,CO_3~(2-) doped Bi_2MoO_6 photocatalyst(CO_3~(2-)/Bi_2MoO_6) was successfully synthesized via a hydrothermal process using Bi(NO_3)_3·5H_2O,(NH_4)_6Mo_7O_(24)·4H_2O and C_6H_5Na_3O_7·2H_2O as starting materials. The physical and chemical properties of CO_3~(2-)/Bi_2MoO_6 were well characterized by X-ray diffraction(XRD), scanning electron microscopy(SEM), transmission electron microscopy(TEM), high-resolution TEM(HRTEM) and UV–vis absorption spectroscopy. Rhodamine B was selected as a model pollutant for investigating the photocatalytic activity of the as-synthesized sample under visible light irradiation. The results indicated that the doping of CO_3~(2-) does not change the crystalline phase of Bi_2MO_6, but the absorption edge of CO_3~(2-)/Bi_2MoO_6 has an red shift. The photocatalytic activities of CO_3~(2-)/Bi_2MoO_6 depend on the concentrate of CO_3~(2-). The photocatalyst displayed the best photocatalytic activity when the molar ratio of C_6H_5Na_3O_7·2H_2O and Bi(NO_3)_3·5H_2O is 7:1.

引文

[1]W.J.Jo,J.W.Jang,K.J.Kong,H.J.Kang,J.Y.Kim,H.C.Jun,K.P.S.Parmar,J.S.Lee,Angew.Chem.Int.Ed.2012,51:3147-3151.
    [2]H.W.Huang,X.W.Li,J.J.Wang,F.Dong,P.K.Chu,T.R.Zhang,Y.H.Zhang,ACSCatal.2015,5:4094-4103.
    [3]C.M.Li,G.Chen,J.X.Sun,J.C.Rao,Z.H.Han,Y.D.Hu,W.N.Xing,C.M.Zhang,Appl.Catal.B:Environ.2016,188:39-47.